Firefox: If Firefox's orange menu button doesn't give you all the options you want, you can customize every last inch of it with a free add-on called Personal Menu.

Personal Menu is a bit difficult to use at first, but after playing around with it for a few minutes, you'll be able to make the Firefox menu way more useful. From the main menu of the add-on's options, you can add nearly any button you want to the Firefox menu, whether it's quick access to another add-ons functions, another submenu, or even a bunch of toolbar buttons (like "Downloads" or "History") along the bottom of the menu. I've long thought Firefox's main menu was missing a lot of important options, so Personal Menu is a godsend for fixing it. Hit the link below to check it out, and be sure to check out the How-To Geek's guide to using it if you're feeling a bit lost.